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Employee Benefits - Disclosure of Permanent Employees and Aggregate Earnings of Employees (Details)
R in Millions
 12 Months Ended
Jun. 30, 2019
ZAR (R)
employee
Jun. 30, 2018
ZAR (R)
employee
Disclosure of geographical areas [line items]    
Total number of permanent employees | employee 32,837 34,031
Salaries and wages and other benefits (excluding share-based payments) | R R 10,623 R 8,930
Retirement benefit costs | R 766 638
Medical aid contributions | R 259 227
Total aggregated earnings | R R 11,648 R 9,795
South African operations    
Disclosure of geographical areas [line items]    
Total number of permanent employees | employee 31,199 32,520
International operations    
Disclosure of geographical areas [line items]    
Total number of permanent employees | employee 1,638 1,511
Wafi-Golpu joint operation    
Disclosure of geographical areas [line items]    
Total number of permanent employees | employee 194 114